Therefore, as for the many shortcomings of furfural refined, it is carried out by adding extraction addition to enhance its refiningyield and the quality of refined oil.
因此，针对糠醛精制的诸多缺点，开展了糠醛中加入精制助剂，提高其精制收率以及精制油质量的研究。
2
The refining method of the propionic acid guanidine of the invention has high refiningyield and menstruum can be recovered and applied, thereby greatly reducing waste water quantity.
本发明丙酸胍的精制方法精制收率高，溶媒可回收套用，并大大减少了废水量。
3
The technical modification of ketone-benzol unit to improve the deoiling yield in Daqing Refining and Chemical Company was carried out in 2004.